74VHC157 Просмотр технического описания (PDF) - STMicroelectronics
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74VHC157 Datasheet PDF : 12 Pages
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74VHC157
Figure 2: Input Equivalent Circuit
Table 3: Truth Table
INPUTS
STROBE
H
L
L
L
L
SELECT
X
L
L
H
H
X : Don’t care
Figure 3: Logic Diagram
Table 2: Pin Description
PIN N°
1
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
15
8
16
SYMBOL
SELECT
1A to 4A
1B to 4B
1Y to 4Y
STROBE
GND
VCC
NAME AND FUNCTION
Common Data Select
Inputs
Data Inputs From Source
A
Data Inputs From Source
B
Multiplexer Outputs
Strobe Input
Ground (0V)
Positive Supply Voltage
OUTPUT
A
B
Y
X
X
L
L
X
L
H
X
H
X
L
L
X
H
H
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